package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        //封装对象
        Setmeal setmeal = new Setmeal();
        //对象属性复制
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //向套餐表插入数据
        setmealMapper.insert(setmeal);

        //获得插入套餐的id
        Long setmealId = setmeal.getId();

        //插入套餐关联的菜品数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishMapper.insertBatch(setmealId,setmealDishes);


    }

    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        //通过v插件获取页数和每页展示数
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);

        Long total=page.getTotal();
        List<SetmealVO> records=page.getResult();
        return new PageResult(total,records);
    }

    @Override
    public void deleteBatch(List<Long> ids) {
        for (Long id:ids){
            //起售中的套餐不可删除
         Setmeal setmeal=   setmealMapper.getById(id);
         if (setmeal.getStatus()== StatusConstant.ENABLE){
             throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
         }
        }

        ids.forEach(setmealId->{
            //先删除套餐表中数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

    @Override
    public SetmealVO getByIdWithDish(Long id) {
        //多表查询?
        SetmealVO setmealVO = setmealMapper.getByIdWithDish(id);
        return setmealVO;
    }

    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        //对象属性复制
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //先修改套餐表
        setmealMapper.update(setmeal);

        //先删除原来的套餐关联的菜品
        setmealDishMapper.deleteBySetmealId(setmeal.getId());

        //获取修改的菜品数据
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishMapper.insertBatch(setmeal.getId(),setmealDishes);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时,判断套餐关联的菜品是否有停售菜品,套餐内包含未起售菜品,套餐不能起售
        //套餐起售中
        if (StatusConstant.ENABLE==status){
            //获取集合,套餐下的菜品集合
            List<Dish> dishes=dishMapper.getBySetmealId(id);
            if (dishes !=null&&dishes.size()>0){
                dishes.forEach(dish->{
                    if (StatusConstant.DISABLE==dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }

        }
        Setmeal setmeal=Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
